Electric sheet-drier



W. J. DANINGBURG.

ELECTRIC SHEET DRIER.

APPLICATION FILED APR. 30| 1920.

Patented 001;. 18, 1921.

INVENTOR A TTORNE Y apparatus showing my UNITED STATES PATENT oFFicE.

' ELECTRIC SHEET-DRIER.

Specification of Letters Patent.

Application fled April 30,1920. Serial No. 377,913.

To all whom it may concern:

Be it known that I, WILLIAM J. Damne- BURG, a citizen of the United States, resid ng at Windsor, Province of Ontario, DOIIllIllOIl of Canada, have invented a certaln new and useful Improvement in Electric Sheet- Driers, and declare the following to be a full, clear, and exact description of the same, such as will enable others skilled in the art to which it pertains to make and use the same, reference being had to the accompanying drawings,'which form a part of thls specification.

This invention relates to apparatus forquickly drying printed sheets, particularly those in which more than one color is 1nvolved in the design, as they come from the printing rolls, and has for its object an 1mproved arrangement of parts by wh1ch the sheet may be subjected to an eflicient heating influence, while being handled by parts'now quite generally. employed in this branch of the arts, and yet permitting avoidance of 1njury to those parts themselves because of the eat. In the drawings:

Fi re 1 is aside elevational view of the printing cylinder members with anendlessv belt or tape carrier and a reclprocatmg carriage whereon is mounted a grating or frame offwhat are called fly sticks.

."Fig. 2 is a fragmentary plan viewof this device in position relatively to the carriage.

' Fig. 3 is an enlarged sectional elevation of one form of my improved drying apparatus.

Fig. 4 is a cross section taken along the line 4-4 of Fig. 3.

Fi 5 is a sectionalview of a slightly modified orm ofdrying member.

Fig. 6 is a cross section along the line 6-6 of Fig. 5.

A represents the frame of a printing press, at one end of which is rotatably mounted the printin cylinder B, from which the printed sheets pass to the endless tapes D, which are spacedly mounted on the rollers E. To

the left of the delivery end of the endless tape carrier, as shown in Fig. 1, the frame A is formed as a track-way, along which the carriage F is adapted to reciprocate, being actuated by the links I and J, the latter pivoted at O to the frame of the machine, and

with its roller-tipped lower end engaging in the track of the actuating cam G. Mounted on the carrier F are a series of fly sticks H,

reaches the limit of which, when the carriage is moved to its nearest polnt of approach to the roller tapes D, are adapted to receive'the printed sheets-C and carry them one by one to the delivery end of the printing machine. As the sheet restmg upon the fly sticks H is drawn to the delivery end of the frame A, it passes slidably over the weighted or spring-held pivoted stop K, which is thereby swung to the dotted line position shown in Fig. 1'; but as the carriage its travel in this direction, the sheet, resting as it does on the fly sticks H, is moved so far toward thedelivery end of the device (the left-hand end as shown in Fig. 1) that its rearward edge passes beyond the spring-held stop K, which, being no longer pressed downwardly (to the dotted llne position shown), at once resumes its upright or full-lineposition; at almost the same.

instant, the sheet encounters the stop L which actuatesthe finger or detent pieces L into selzing engagement with the adjacent or forward edge of the sheet, so that when the carriage and its supported frame of fly sticks starts to tfavel away from thestop L and back toward the right-hand end of the apparatus (as seen in Fig. 1), the paiper sheet is frictionally held against movement with the fly stick supports further than the stop K, whlch, in its now upright position, engages the rearward edge of the sheet (that nearest the rollers E and endless tapes D). The forward or left hand edge of the sheet has by thls timepassed over, and continues to slid ably pass over the smooth surface of the metal tube M, which, in the form shown-in Fig. 3, is asbestos lined as at N, and incloses a series of heat-resisting elements P, connected with one another by fuses Q, and with a suitably insulated return wire R passing through the center of the tube to connection with the current cord S, one wire of which is of course connected to the adjacent end of the nearest heat resistin element P. This dryin member, while tins efliciently serving to i831 the sheet and thus dry the ink as the sheet slowly passes over, its smooth surface, is at all times sufiiciently remote from the ta e D, so that its heat exerts no rottin in uenceoupon the tapes, as is the case w en some form of heating member is permanently located near the tapes for influence upon the sheets as they but as well avoids any cycle of operations,

cylinder T inclosed within a metal cylinder V, the cement cylinder being wound with a series of coils W, suitably connected with a source of electricity by the wire X and the insulated return wire Y These coils are spaced from the adjacent interior face of the cylinder V by asbestos or isinglass fillers U.

This heating of the sheets not only accelerates the drying of the ink, thus enabling a larger number to be handled in a given time,

tendency to the presence, within their mass when piled,- of static electricity, which is a factor already known as necessary to contend with in connection with the printing of cold sheets.

It sometimes proves desirable to locate one of these dryin elements in the vicinity of the printing cy inder B and the endless tapes, as well as in position on the reciprocating carriage as described, and I have indicated this at M in Fig. 1. In such case the points on its periphery in line with the several endless tapes D should be protected by strips or bands of asbestos or similar protective material.

What I claim is:

1. In a printing mechanism, in combination with an endless belt mechanism, adapted to eiiect' the travel of the paper sheets away from the immediate vicinity of the printin element, a reciprocatory carrier adapte said endless belt mechanism, and adrying member located onthe other side of said reciprocatory carrier from said endless belt mechanism, over which the printed sheets are adapted to slide wh'enthey have been carried b said reciprocatory carrier to the limit of its travel away from said endless belt mechanism.

2.-In combination with a reciprocatory carrier for receiving printed sheets, a transverselydisposedtubularshellinclosingelectrically actuated heating elements, over which said'sheets are caused to travel after resting on said carrier during a portion of each said drying member bethereby heating to receive the printed sheet from .ing located on the opposite end of said car rier from that first encountered by the printed sheets as they are fed theretoward.

3. An ink-drying element for a printing mechanism, comprising an over Whose outer surface the sheets are adapted to pass, a series of connected resistance units within said casing, and suitably insulated wires connected therewith.-

4. In combination with means for causing the travel of printed sheets thereover, a drying member comprising an inclosing shell, a series of resistance elements located there- Within, and insulated wires leading to connection with an external source of electricity for energizing said resistance elements,

said inclosing shell.

5. The COIIlblLJtlOIl, with a reciprocatory sheet carriage of a printing mechanism, means adapted to be encountered by the rinted sheets as the carriage travels in the direction from which the printed sheets are fed, wherebv each sheet is swept toward the opposite end of said carriage, and a heating member located near the last-mentioned end of the carriage, over which each sheet must travel as it is swept from its position on the carriage, said heating member comprising an inclosin v,shell and an included electrical heating e ement'adapted toregulatably impart a drying influence on the freshly rinted sheets passing over the outer surfaces of said inclosing shell.

6. In combination with means for causing the travel of printed sheets thereover, a heating member comprisin a tubular casing, electrical conducting e ements therewithm whereby the same'may be heated, and insulating means separating said electrical conductin elements from the adjacent inter-ior sur ace of thetubular casing.

In testimony whereof I sign th1s'specifi' cation-in the presence of two witnesses.

WILLIAM J. DANINGBU'RG.

Witnesses WILLIAM M. Swan, Jameson G. Tmmean.

inclosing casing 

